Reduce SchemaFactory to generating a new AIS or working on an existing one. Remove generation of partial AIS based on existing one.
Make ApiTestBase just use DDL in the ordinary way for its operations, rather than a third instance of Table/Index/... via SchemaFactory.
merge nathanlws: Add retry helper to TransactionService

Merge pull request #1001 from nathanlws/sql-layer/txn-service-run
https://github.com/FoundationDB/sql-layer/pull/1001
merge MMcM: Simplify SchemaFactory contract

Merge pull request #1003 from MMcM/sql-layer/schema-factory-simplify
https://github.com/FoundationDB/sql-layer/pull/1003
Switch to ByteBuffer for Protobuf read and write
Remove max AIS size setting
Remove SerializationType
New metadata layout in PSSM